APA Style

Slobodkina, E. (1968). Caps for sale : a tale of a peddler, some monkeys, and their monkey business . New York, USA: Scholastic Inc.

MLA Style

Slobodkina, Esphyr. "Caps for sale : a tale of a peddler, some monkeys, and their monkey business". New York, USA: Scholastic Inc, 1968. Text.